CIVector extension to multiply each component by a single CIFloat

gistfile1.txt

extension CIVector
{
    func multiply(value: CGFloat) -> CIVector
    {
        let n = self.count
        var targetArray = [CGFloat]()
        
        for i in 0 ..< n
        {
            targetArray.append(self.valueAtIndex(i) * value)
        }
        
        return CIVector(values: targetArray, count: n)
    }
}